Powell, J.B. and Burton, G.W. (1966) Nucleolus-Organizing Accessory Chromosomes in Pearl Millet, Pennisetum typhoides. Crop Science, 6 (2). pp. 131-134.
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Abstract
Accessory chromosomes were discovered in an inbred line of pearl millet, Pennisetum typhoides (Burm.) Stapf and C.E. Hubb. The accessory chromosomes organized nucleoli which were independent of the A-chromosome nucleolus in some microsporocytes and associated with the A-chromosome nucleolus in others. Two A-chromosomes in this inbred line associated with a single nucleolus in contrast to only one nucleolus-organizing A-chromosome commonly found in most pearl-millet lines. Accessory chromosomes ranged from one to five within plants, and varied in number from plant to plant, head to head, spikelet to spikelet, and cell to cell. Small, intermediate, and large accessories were obesrved. Characteristic folding back on itself at diakinesis exhibited by the larger accessory suggested an isochromosome derived from the intermediate-sized accessory. The number of accessories per cell appeared to have little effect on A-chromosome pairing. Microsporocytes with the least amount of accessory-chromosome association also had the least A-chromosome pairing
| Item Type: | Article |
|---|---|
| Author Affiliation: | Research Geneticist and Principal Geneticist, respectively, Crops Research Division, ARS, USDA, and the University of Georgia, College of Agriculture Experiment Stations, Coastal Plain Experiment Station, Tifton, Georgia |
| Subjects: | Plant Protection |
| Divisions: | Millet |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 23 Dec 2011 08:22 |
| Last Modified: | 23 Dec 2011 08:22 |
| Official URL: | https://www.crops.org/publications/search?search%5... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2862 |
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